From: Juergen Beisert <jbe@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 4/4] ARM/MXS: add reset cause detection
Date: Fri, 13 Jul 2012 08:04:49 +0200 [thread overview]
Message-ID: <1342159489-1474-5-git-send-email-jbe@pengutronix.de> (raw)
In-Reply-To: <1342159489-1474-1-git-send-email-jbe@pengutronix.de>
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
---
drivers/watchdog/im28wd.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/watchdog/im28wd.c b/drivers/watchdog/im28wd.c
index b016910..eb6099a 100644
--- a/drivers/watchdog/im28wd.c
+++ b/drivers/watchdog/im28wd.c
@@ -21,6 +21,7 @@
#include <errno.h>
#include <malloc.h>
#include <watchdog.h>
+#include <reset_source.h>
#define MXS_RTC_CTRL 0x0
#define MXS_RTC_SET_ADDR 0x4
@@ -73,6 +74,27 @@ static int imx28_watchdog_set_timeout(struct watchdog *wd, unsigned timeout)
return 0;
}
+static void __maybe_unused imx28_detect_reset_source(const struct imx28_wd *p)
+{
+ u32 reg;
+
+ reg = readl(p->regs + MXS_RTC_PERSISTENT0);
+ if (reg & MXS_RTC_PERSISTENT0_EXT_RST) {
+ writel(MXS_RTC_PERSISTENT0_EXT_RST,
+ p->regs + MXS_RTC_PERSISTENT0 + MXS_RTC_CLR_ADDR);
+ set_reset_source(RESET_POR);
+ return;
+ }
+ if (reg & MXS_RTC_PERSISTENT0_THM_RST) {
+ writel(MXS_RTC_PERSISTENT0_THM_RST,
+ p->regs + MXS_RTC_PERSISTENT0 + MXS_RTC_CLR_ADDR);
+ set_reset_source(RESET_RST);
+ return;
+ }
+
+ set_reset_source(RESET_RST);
+}
+
static int imx28_wd_probe(struct device_d *dev)
{
struct imx28_wd *priv;
@@ -94,6 +116,9 @@ static int imx28_wd_probe(struct device_d *dev)
if (rc != 0)
goto on_error;
+ if (IS_ENABLED(CONFIG_GLOBALVAR))
+ imx28_detect_reset_source(priv);
+
dev->priv = priv;
return 0;
--
1.7.10.4
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next prev parent reply other threads:[~2012-07-13 6:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-13 6:04 [PATCHv4] Enable a way to provide the reason for "being here" Juergen Beisert
2012-07-13 6:04 ` [PATCH 1/4] " Juergen Beisert
2012-07-16 8:37 ` Sascha Hauer
2012-07-13 6:04 ` [PATCH 2/4] ARM/Samsung: add support to detect the reset source Juergen Beisert
2012-07-13 6:04 ` [PATCH 3/4] ARM/i.MX: " Juergen Beisert
2012-07-13 6:04 ` Juergen Beisert [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-07-18 8:46 [PATCHv5] Enable a way to provide the reason for "being here" Juergen Beisert
2012-07-18 8:46 ` [PATCH 4/4] ARM/MXS: add reset cause detection Juergen Beisert
2012-07-12 13:47 [PATCHv3] Enable a way to provide the reason for "being here" Juergen Beisert
2012-07-12 13:47 ` [PATCH 4/4] ARM/MXS: add reset cause detection Juergen Beisert
2012-07-12 19:56 ` Marc Kleine-Budde
2012-07-13 5:31 ` Juergen Beisert
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